Glutathione is known as the master antioxidant. This critical compound protects cells from damage caused by free radicals and toxins, supports detoxification, plays a key role in DNA synthesis and repair, All About Glutathione: Benefits and Uses of the Natural Antioxidant Eat These Foods to Increase Glutathione in Your Body Vitality Medical Wellness Center Glutathione 500 mg Plus 21st Century Vitamins 21st Century Vitamins Glutathione is known as the body's master antioxidant and detoxifier. Found in large quantities in the liver, it's key to supporting the immune system.